Atriangle can be formed with side lengths 5, 7 and 10. true false

TRUE

If a+b is bigger than c, the triangle can be formed.

5+7 is bigger than 10

Using the relation between the sides of a triangle, the answer is True.

Step-by-step explanation:

The length are 5, 7 and 10.

In any triangle:

1) The sum of the lengths of any two sides is greater than the length of the third side.

5+7=12 > 10  ok

5+10=15 > 7 ok

7+10=17 > 5  ok

2) The difference between the lengths of any two sides is less than the length of the third side.

7-5=2 < 10  ok

10-5=5 < 7 ok

10-7=3 < 5  ok

what?

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!